Harvard Cancer Study Methodology Flawed, Generates Absurd Results

Questionable Methodology

Researchers have replicated and expanded an analysis of Harvard studies that previously claimed to link nuclear power plants to higher rates of cancer incidence and mortality. The core issue lies in the methodology employed by these Harvard studies, which, when applied to unrelated landmarks, generates statistically significant but logically absurd conclusions about cancer mortality.

Absurd Findings from Replicated Analysis

Using the same methodology, living near a Costco warehouse was found to be associated with 120,687 cancer deaths annually, private colleges with 83,782, and Harvard itself with 5,842. Furthermore, living near a Major League Baseball field was linked to almost 19 times more cancer deaths than living near a Major League Soccer pitch. These results highlight the fundamental flaws in the original studies' approach, indicating that the methodology consistently produces spurious correlations.

Original Harvard Studies Under Scrutiny

The criticized studies include a December 2025 paper in Environmental Health by Yazan Alwadi and colleagues, which associated nuclear power plants with increased cancer incidence in Massachusetts. Subsequent papers in Nature Communications, the Journal of Exposure Science & Environmental Epidemiology, and Environmental Epidemiology expanded these claims to nationwide cancer mortality and total mortality, respectively. All these studies utilized a "proximity score" to assess exposure.

Flawed Proximity Scoring

The "proximity score" methodology assigns higher weights to locations closer to a landmark, treating all ZIP codes or counties within a certain radius (up to 120 km in Massachusetts, 200 km nationally) as exposed. This cumulative scoring system means that a location further from a single plant but within range of multiple plants could receive a higher score. Critics argue that this method fails to establish a causal link and instead generates misleading associations.